Java Program Sentinel Control Loop

Java Program Sentinel Control Loop

Use in Program Eclipse

import java.util.Scanner;
public class SentinelControlLoop {

 /**
  * 
  * @param args
  */
 public static void main(String[] args) {
  // TODO Auto-generated method stub
  
  Scanner myInput = new Scanner(System.in);
  
  
  //Declare Variables
  int num, sum = 0, max, min, count =0;
  double average = 0.0;
  final int Sentinel = -9999;
  
  
  //Priming Stage
  System.out.print("Enter an integer value, or -9999 to quit: ");
  num = myInput.nextInt();
  
  //intitalize max and min
  max = min = num;
  
  
  
  //WHILE Loop
  while (num != Sentinel) {
   //body of loop
   //Update Sum
   sum = sum + num; //sum +=
   System.out.println("Sum is now "+ sum);
   
   if (num > max)
    max = num;
   if (num < min)
    min = num;
   
   //increment count of data items read
   count++; //Same as count = count + 1;
   System.out.print("num = " + num + " Count = " + count );
   System.out.print(" Enter an integer value, or -9999 to quit: ");
   num = myInput.nextInt();
   
   
  }
  if (count != 0) {
   average = (double)sum / count;
   System.out.println("Average is " + average);
   System.out.println (" max = "+ max + ", min " + min);
  }
  else 
   System.out.println("Cant average 0 items ");
  
 }

}

-->

Java Program Methods/Arrays Exam Scores Average, Max and Min

Java Program for Arrays. Average, Random Shuffle, Max and Min Arrays for Exam Scores

For use in Eclipse.

import java.util.Scanner;
public class Put Your Class here {

 /**
  * 
  * @param args
  */
 public static void main(String[] args) {
  // TODO Auto-generated method stub
  double[] exam1 = new double[10];
  double average;
  double max, min;
  

  fillArray(exam1);
  printArray(exam1);
  average = getArrayAverage (exam1);
  System.out.printf(" Average Exam 1 Score is %6.2f \n", average);
  max = getMax(exam1);
  min = getMin(exam1);
  randomShuffle(exam1);
  printArray(exam1);
 
  selectionSort(exam1);
  printArray(exam1);
  
  
  
 }//End of main
 public static void fillArray( double[] list) {
  Scanner myIn = new Scanner(System.in);
  for (int i=0; i <list.length; i++){
   System.out.print("Enter a number: ");
   list[i] = myIn.nextDouble();
  }//end of for loop
 }//end of the fill array loop

 public static void printArray(double[] list) {
  System.out.println(" \t Index \t Value \n");//print header
  System.out.println("=======================");
  for (int i=0; i <list.length; i++){
   System.out.println("\t" + i + "\t" + list[i]);
  }//end of for loop
 }//end of print array method
 
 public static void randomShuffle(double[] list) {
  int j; 
  double temp;
  for (int i= 0; i <list.length; i++) {
   j = (int)(Math.random() * 5);
 
  j= (int) (Math.random() * list.length);
  temp = list[i];
  list[i] = list[j];
  list[j] = temp;
 }//end of for
}// end of random shuffle
 
 public static void selectionSort(double[] list) {
  double currentMin;
  int currentMinIndex;
  
  for (int i = 0; i < list.length - 1; i++) {
   currentMin = list[i];
   currentMinIndex = i;
   
   for (int j= i + 1; j < list.length; j++){
    if (list[j] < currentMin) {
     currentMin = list[j]; currentMinIndex = j;
    }//end if
   }//end inner loop
   if (currentMinIndex != i) {
    list[currentMinIndex] = list[i];
    list[i] =currentMin;
   }//end if
  }// end outer loop
 }//end selection sort
 
 public static double  getArrayAverage(double[] list) {
  double avg=0.0, total=0.0;
  
  for (int i=0; i <list.length; i++){
   total = total + list[i];
  }//end of for loop
  if (list.length > 0) avg = total / list.length;
  return avg;
 }//end of the get array average method
 
 public static double getMax(double[] list) {
  double m = Double.MAX_VALUE;
  for (int i =0; i < list.length; i++){
   if (list[i] > m) m = list[i];
  }
  return m;
 }
 public static double getMin(double[] list) {
  double n = Double.MAX_VALUE;
  for (int i =0; i < list.length; i++){
   if (list[i] < n) n = list[i];
  }
  return n;
 }

 
}//End